Twitter has become the latest target of a sophisticated cyber attack, with around 250,000 accounts exposed. The breach appears to be the latest in a string of attacks on news content sites that’s being blamed on Chinese hackers.

­In its blog, Twitter has announced that it has detected “unusual access” patterns to user’s data and one live attack, which the company has successfully disabled. However, the company states that quarter of a million users have had their information hacked.

“This attack was not the work of amateurs, and we do not believe it was an isolated incident. The attackers were extremely sophisticated, and we believe other companies and organizations have also been recently similarly attacked,” statement explained.